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Submission #493461

# Submission time Handle Problem Language Result Execution time Memory
493461 2021-12-11T12:18:56 Z FEDIKUS Palindromes (APIO14_palindrome) C++17
100 / 100
 95 ms 119744 KB 
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define xx first
#define yy second
#define ff(i,s,f) for(ll i=s;i<f;i++)
#define fb(i,s,f) for(ll i=(s)-1;i>=f;i--)
#define ffi(i,s,f) for(ll i=s;i<=f;i++)
#define fbi(i,s,f) for(ll i=s;i>=f;i--)
#define srt(a) sort(a.begin(),a.end());
#define srtg(a,ll) sort(a.begin(),a.end(),greater<ll>())
#define lb(a,x) lower_bound(a.begin(),a.end(),x)
#define ub(a,x) upper_bound(a.begin(),a.end(),x)
#define fnd(a,x) find(a.begin(),a.end(),x)
#define vstart auto startt=chrono::system_clock::now()
#define vend auto endd=chrono::system_clock::now()
#define vvreme chrono::duration<double> vremee=endd-startt
#define ios ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair<ll,ll> pii;
typedef pair<ll,ll> pll;
typedef string str;

struct node{
    ll dje[26];
    ll be=0,cnt=0,len=0;
};

vector<node> pt;

node prazan;
ll tren;
string s;

void addletter(ll i){
    if(pt[tren].len==i) tren=pt[tren].be;
    while(s[i-pt[tren].len-1]!=s[i]){
        tren=pt[tren].be;
    }
    if(pt[tren].dje[s[i]-'a']==0){
        pt.push_back(prazan);
        pt[tren].dje[s[i]-'a']=pt.size()-1;
    }
    ll len=pt[tren].len+2;
    ll be=-1;
    ll ntren=tren;

    tren=pt[tren].dje[s[i]-'a'];
    pt[tren].len=len;
    pt[tren].cnt++;
    if(ntren==1){
        be=2;
        pt[tren].be=be;
    }else{
        ntren = pt[ntren].be;
        while(s[i-pt[ntren].len-1]!=s[i]){
            ntren=pt[ntren].be;
    }
        be=ntren;
        if(pt[be].dje[s[i]-'a']==0){
            pt.push_back(prazan);
            pt[be].dje[s[i]-'a']=pt.size()-1;
        }
        pt[tren].be=pt[be].dje[s[i]-'a'];
    }
}

void init(){
    pt.clear();
    pt.push_back(prazan);
    pt.push_back(prazan);
    pt.push_back(prazan);
    pt[1].len=-1;
    pt[1].be=1;
    pt[2].len=0;
    pt[2].be=1;
    tren=1;
}

void solve(){
	cin>>s;
	init();
	for(ll i=0;i<s.size();i++) addletter(i);
	for(ll i=(ll)pt.size()-1;i>=1;i--){
        pt[pt[i].be].cnt+=pt[i].cnt;
	}
	ll maxi=-1;
	for(ll i=1;i<pt.size();i++){
        maxi=max(maxi,pt[i].cnt*pt[i].len);
	}
	cout<<maxi;
}

int main(){
    ios;
    ll t=1;
    //cin>>t;
    while(t--) solve();
    return 0;
}

Compilation message

palindrome.cpp: In function 'void solve()':
palindrome.cpp:89:14: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |  for(ll i=0;i<s.size();i++) addletter(i);
      |             ~^~~~~~~~~
palindrome.cpp:94:14: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |  for(ll i=1;i<pt.size();i++){
      |             ~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 0 ms 332 KB Output is correct
21 Correct 0 ms 332 KB Output is correct
22 Correct 0 ms 332 KB Output is correct
23 Correct 0 ms 332 KB Output is correct
24 Correct 0 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 0 ms 332 KB Output is correct
28 Correct 0 ms 332 KB Output is correct
29 Correct 0 ms 332 KB Output is correct
30 Correct 0 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 0 ms 332 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 616 KB Output is correct
2 Correct 1 ms 616 KB Output is correct
3 Correct 1 ms 616 KB Output is correct
4 Correct 1 ms 616 KB Output is correct
5 Correct 1 ms 616 KB Output is correct
6 Correct 1 ms 616 KB Output is correct
7 Correct 1 ms 616 KB Output is correct
8 Correct 1 ms 616 KB Output is correct
9 Correct 1 ms 616 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 1 ms 616 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4104 KB Output is correct
2 Correct 3 ms 4104 KB Output is correct
3 Correct 3 ms 4104 KB Output is correct
4 Correct 3 ms 4104 KB Output is correct
5 Correct 4 ms 4104 KB Output is correct
6 Correct 3 ms 4116 KB Output is correct
7 Correct 3 ms 4104 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 2 ms 2220 KB Output is correct

Subtask #4
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 30364 KB Output is correct
2 Correct 23 ms 30364 KB Output is correct
3 Correct 26 ms 30364 KB Output is correct
4 Correct 27 ms 30352 KB Output is correct
5 Correct 26 ms 30364 KB Output is correct
6 Correct 27 ms 30308 KB Output is correct
7 Correct 23 ms 30364 KB Output is correct
8 Correct 3 ms 844 KB Output is correct
9 Correct 8 ms 8100 KB Output is correct
10 Correct 24 ms 30356 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 87 ms 119668 KB Output is correct
2 Correct 87 ms 119672 KB Output is correct
3 Correct 89 ms 119744 KB Output is correct
4 Correct 87 ms 119660 KB Output is correct
5 Correct 95 ms 119744 KB Output is correct
6 Correct 84 ms 119740 KB Output is correct
7 Correct 59 ms 60224 KB Output is correct
8 Correct 9 ms 1288 KB Output is correct
9 Correct 6 ms 1236 KB Output is correct
10 Correct 69 ms 60152 KB Output is correct
11 Correct 85 ms 119708 KB Output is correct
12 Correct 13 ms 8136 KB Output is correct